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deps/g3dlite/include/G3D/Frustum.h

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+/**
+  \file G3D/Frustum.h
+
+  \maintainer Morgan McGuire, http://graphics.cs.williams.edu
+
+  \created 2005-07-20
+  \edited  2013-06-11
+*/
+
+#ifndef G3D_Frustum_h
+#define G3D_Frustum_h
+
+#include "G3D/platform.h"
+#include "G3D/g3dmath.h"
+#include "G3D/Plane.h"
+#include "G3D/SmallArray.h"
+#include "G3D/Vector4.h"
+
+namespace G3D {
+
+class Box;
+
+/** \see Projection */
+class Frustum {
+public:
+    class Face {
+    public:
+        /** Counter clockwise indices into vertexPos */
+        int             vertexIndex[4];
+
+        /** The plane containing the face. */
+        Plane           plane;
+    };
+        
+    /** The vertices, in homogeneous space.  The order is that of
+        the near face, starting from the (object space) +x,+y corner
+        and proceeding CCW from the camera's point of view; followed
+        by the far face also in CCW order.
+    
+        If w == 0,
+        a vertex is at infinity. */
+    SmallArray<Vector4, 8>      vertexPos;
+
+    /** The faces in the frustum.  When the
+        far plane is at infinity, there are 5 faces,
+        otherwise there are 6.  The faces are in the order
+        N,R,L,B,T,[F].
+        */
+    SmallArray<Face, 6>         faceArray;
+
+    /** \param minObjectSpaceDepth Smallest value permitted for the near plane Z - far plane Z (e.g., to force finite bounds)*/
+    Box boundingBox(float minObjectSpaceDepth = finf()) const;
+};
+
+} // namespace G3D
+
+#endif